Improvement in water-cocks



c'. AP. ZIM'MRMAN. Watr-Cocks. N0 148 542 Patented Marcvh-10.-1874.

Fuga Fig 3.

UNITED" STATES PATENT QFFICE;

CHARLES P. ZIMMERMAN, OF NEVARK, NEW JERSEY, ASSIGNOR OF ONE- HALF HIS RIGHT TO ISAAC I).

BROWN, Jn., or SAME PLAGE.

IMPROVEMENT IN WATER=COCKS.

Specification forming part of Letters Patent No. 148,542, dated March 10, 1874; application led February 14, 1874.

To all whom it may concern:

Be. it known that I, CHARLES I. ZIMMER- certain new and useful Improvements in Water-Cocks, and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The natureof my invention consists in providing an air-passage in addition to the usual water-way in a cock, to be opened or closed by a valve as the water-pressure is oit' or on the said valve, "as will be more fully hereinafter illustrated.

My invention has for its object the prevention of the collapsion of the water reservoir,77 at present extensively used as a part of the water-fixtures of buildings when a vacuum has been created in the reservoir by its supply-pipe from the exhaustion oi' the water in the street-main7 which supplies said reservoir, as in case of lire in the neighborhood, also supplied by the same street-main; and this accident to the reservoir is eftectually prevented by attaching one of my improved water-cocks to an outlet-pipe of the reservoir.

To enable others skilled in the art to make and use my invention, I will now proceed to give a more specific description oi' its operation and construction.

In the drawings, Figure 1 is a vertical section of my invention, and Figs. 2 and 3 de-A tail views.

A is the case of an ordinary water-cock, with a common truste-conical stopper, B, secured in place. A groove is cut around the stopper at b, Fig. l. A narrow vertical channel, a, in the case'A next to the stopper B, is cut from a point opposite the groove b to the water-way-of case A. In an enlargement of the case A, on its upper surface, I provide a vertical cylindrical chamber, C, which has communication through passageD with groove b, and through openin g E with the water-way of case A, as shown in Fig. 1. Opening E serves as the seat for valve F, whose construction is clearly indicated in the drawings, be-

ing shown in vertical sectionv in Fig. l, and side elevation in Fig. 3. Chamber C is closed at top by means of a screw-plug, G, which snugly fills this chamber. (See Fig. l.) This plug Gr has a recess-or chamber, g, in which valve F can have the requisite play, and "recess g communicates with the small central chamber h, and the several passages, c, which extend from it to the groove E cut around the plug Gr, and so with the passage D.

From this construction, I am able to obtain an air-'passage which extends from the channel a through groove b, passage D, groove c, passages c, chambers h and g, through holes j', in valve F, to the inlet side of the case A.

When my invention is thus constructed and applied to an outlet-pipe of a reservoir, the water will at once lift the valve F up into the recess g, and lit it closely against the roof of this recess or chamber g, and so cut oft' communication with the inlet side of the case A, and lthe air-passage just described; and as long as the water-pressure continues so long will this air-passage be closed, and thus prevent the escape of water; but should there be a lire in the neighborhood, which is supplied by water from the same street-main that supplies the water-xtures to which my invention is applied, and the said streetmain be exhausted by the rapid and copious demands oi' the fire, the water in said waterdixtures, with their reservoir, will be emptied, and then withdrawing the water from the pipe to which my water-cock is'applied, the valve F will automatically drop down into its seat E, and the air will rush in through the air-passage before described, fill the reservoir and water-iixtures, and so prevent the formation of a vacuum and consequent collapsion of any of the water-lixtures.

As res occur frequently in the ni ght-time, when no one, because of sleep, can open the usual watercock to prevent the accident oi' collapsion, or those whose duty it is to attend to this may not do so at the proper moment, although conscious of a re in the vicinity, it is a great advantage to have my valve to act automatically, as described.

Having thus fully described my invention,

what I claim as new, and desire to secure by scribed certain new and useful improvements Letters Patent, isin water-cocks, I have hereunto signed my The valve F, in combination with screw-4 name this 27th day of December, 1872. plug G passage D groove b and channel a to autoinatioally control the air-passage, con CHARLES P' ZIMMERMAN' structed and operating substantially in the Vitnesses: manner set forth. ABRAHAM MANNERS,

In testimony that I claim the above-de- WM. M. LITTELL. 

